Tool-holder.



J P. DRAPER.

TOOL HOLDER.

APPLlCATION men use. 3. 1915.

Patented Oct. 3, 1916.

m z/z/vm. 2 JOHN/J. DRA PER rrn ,cTATES PATENT OFFICE.

JOHN PERRY 'nnnrnmor PORT HURON, MICHIGAN, ASSIGNOR or ONE-HALF TO -WILLIA1VI enonon ROGERS, on sat. THOMAS, ONTARIO, CANADA.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Oct. 3, 1916.

Application filed December 3, 1915. Serial No. 64,896.

Michigan, United States of-America, have invented certain new and useful Improvements in Tool-Holders, of which the follow-' One of the ball portions 10 is provided with ing is the specification.

My invention relates to improvements in tool holders and the object of the invention is to devise a holder adapted to hold various sizes of tools and by which thetoolmay be adjusted to swing in a verticalplane to give it any angle or longitudinal tilt desired and in which the tool may also be turned around its longitudinal axis to any desired pitch or rake and yet such a device as will hold the tool firmly in any position to which it may be adjusted and it consists essentially of a tool arm having a forked end, the lower arm of the fork being cupped on its-inner face, a ball resting in the cup and having diametric tool holding orifices and divided into two semi-spherical portions having a portion of each of said orifices in each ball portion and means extending through the other arm for clamping the ball portions together in a stationary position within the cup or socket as hereinafter more particularly explained by the following specification.

Figure 1, is a general perspective view of a portion of a tool arm showing my tool holding means and the tool in a horizontal position. Fig. 2, is a similar view to Fig. 1 showing the tool tilted longitudinally. Fig. 3, is a longitudinal section through the forked end of thearm and thetool support. Fig. 4, is a cross sectional view on line w-y Fig. 3. Fig. 5, is a perspective detail'of the clamping member. Figs. 6 and 7 are perspective details of the semi-spherical ball portions forming my tool holder.

In the drawings like letters of reference indicate corresponding parts in each figure.

1 indicates a tool supporting arm, the shank of which is of any suitable construction and is provided with a forked outer end 2, such forked portion comprising an upper arm 3 and a lower arm 4 which'is provided with a cupped recess 5.

7 indicates an orifice formed in the arm 3 vertically opposite the orifice 6.

8 indicates a ball comprising the semispherical portions 9 and 10. Each ball portion 9 and 10 is provided on its 'flat face with. a series of diametrically extending grooves 11 and 12, which when the ball portions are placed together, form orifices 13. These orifices 13 are ofvarious sizes so as to accommodate tool shanks of various sizes.

a pair of orifices 14 and the other ball portion with a pair of pins 15 designed to fit into the orifices 14: so as to keep the ball portions in proper alinement.

16 indicates a semi-spherical cap provided with a central orifice 17. The lower edge of the cap 16 is of spiral formation as fully shown in Fig. 5 for a purpose which will hereinafter appear. The cap 16 is preferably provided with a knurled rib 18 by which the cap may be turned around its center.

19 indicatesa set screw which is screwed through the orifice 7 against the top of the cap 16.

In assembling my holder the lower ball portion 10 and the upperball portion 9 are placed together so that the pins 15 enter the orifices 14. The cap 16 is then placed upon the top of the ball portion 9 and a ball inserted in the cup or socket 5. The tool is then inserted in the orifice 13 formed by the opposing grooves 11 and 12. The set screw ing any tilting movement ofthe tool when operating against the work. When it is desired to tilt the tool longitudinally all that it is necessary'to do is to loosen the set screw 19 slightlyand turn the cap 16 around its vertical axis so that, the spiral portion 17 is carried circumferentially thereby forcing the outer end of the tool downwardly and permitting the inner endto rise upwardly to an inclined position. The tool may also be, when the set screw 19 is loosened, swung in a horizontal direction so as to direct the outer or operating end of the tool for working conveniently under varied conditions against various forms of work.

If it is desired to adjust the tool to give it a pitch or rake all that it is necessary to do is to loosen the set screw and turn the tool around its longitudinal axis carrying the ball in a longitudinal direction into the position indicated in Fig. 4 of the drawings.

Although I have shown a tool holder supporting a tool having a squared shank it will, of course, be understood that the balls may be formed having various shaped grooves to hold various forms of shanks. Hitherto it has been necessary to supply a complete tool holder for every form and size of tool. By my device it is found necessary only to supply one tool holder with two or three divided balls having grooves therein so as to provide a holder for holding all the tools necessary for doing all classes of work.

From this description it will be seen that I have devised a very simple form of holder adapted to hold various kinds of tools which may be easily and readily adjusted so as to hold the tool at any required angle and so that the tool may be turned to any required pitch to give it the desired rake.

What I claim as my invention is:

1. In a tool holder, the combinationwith the tool supporting arm having a forked outer end, a ball holder having a diametrically extending tool holding orifice, and means turnable on the ball for hearing against the shank of the tool to hold the ball and tool shank in any desired angle or tilt,

and means for clamping the ball between the JOHN PERRY DRAPER.

Witnesses:

FRED C. SLATER, "J. T. FULLER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. 0. 

